[SILGen] Remove an unnecessary scope in emitImplicitValueConstructor

Author: hborla

lib/SILGen/SILGenConstructor.cpp

@@ -254,7 +254,6 @@ static void emitImplicitValueConstructor(SILGenFunction &SGF,
 
     // If it's memberwise initialized, do so now.
     if (field->isMemberwiseInitialized(/*preferDeclaredProperties=*/false)) {
-      FullExpr scope(SGF.Cleanups, field->getParentPatternBinding());
       assert(elti != eltEnd && "number of args does not match number of fields");
       (void)eltEnd;
       value = std::move(*elti);